Abstract
Long non-coding RNAs (lncRNAs), which belong to the non-protein-coding RNAs, are greater than 200 nt in length. Although they have been found to play crucial roles in the regulation of cell growth and development, cell metabolism and the development of diseases, they are rarely reported in decidualization. The objective of our study is to explore the expression of lincRNA AC027700.1 in the endometrium of early pregnant mice and its role in decidualization. The expression of AC027700.1 in uterine tissues at implantation sites and inter implantation sites on the 6th day of pregnancy were detected by qRT-PCR. The relative expression of AC027700.1 in an in vivo model of induced decidualization in pseudopregnant mice and in in vitro model of induced decidualization in primary stromal cells and nucleus/cytoplasmic fractions were detected by qRT-PCR. GO and KEGG analysis of downstream target genes were performed by GOseq and KOBAS, respectively. The results show that AC027700.1 expression is significantly increased in tissues at implantation sites on the 6th day of pregnancy and in decidualized endometrial tissues and stromal cells. Furthermore, AC027700.1 localizes in the nuclear fraction and the downstream targeted genes are mainly involved in autophagy, cell cycle and RNA transport pathways. This study revealed that lincRNA AC027700.1 may be involved in decidualization of endometrium in early pregnancy, but the specific role and regulatory mechanism remain to be further studied.
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